EP 0332741 B1 19910918 - MULTISTAGE VACUUM PUMP
Title (en)
MULTISTAGE VACUUM PUMP
Publication
Application
Priority
EP 88102986 A 19880229
Abstract (en)
[origin: EP0332741A1] The invention relates to a multistage vacuum pump (1) with a housing with a minimum of two expansion chambers (11, 12, 13) in the housing and with a minimum of one duct (52) joining the expansion chambers to one another; in order to be able to detect contamination in the particularly susceptible connecting ducts by simple means it is proposed to design this as part of a bore hole (55) leading to the outside which can be closed by means of a plug (59). <IMAGE>
IPC 1-7
IPC 8 full level
F04C 23/00 (2006.01); F04C 29/00 (2006.01)
CPC (source: EP)
F04C 23/001 (2013.01); F04C 29/0092 (2013.01)
Citation (examination)
DE 2158866 A1 19730530 - ENGSTFELD WILH FA
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0332741 A1 19890920; EP 0332741 B1 19910918; DE 3865009 D1 19911024
DOCDB simple family (application)
EP 88117706 A 19881025; DE 3865009 T 19881025